The Problem of Ultrafine Particles
The Making of the Great Pyramids
Illicit Hackers vs. Ethical Hackers
The Science Behind Clouds
Vocabulary Words
100
What are ultrafine particles?
Extremely small particles in the air.
100
In which country are the Great Pyramids located?
Egypt
100
What is a hacker?
A person who accesses computer systems.
100
Clouds are made of tiny droplets of what?
Water or ice crystals
100
to damage or destroy something, especially public property, on purpose
vandalize
200
Why are ultrafine particles dangerous?
They can enter the lungs and bloodstream.
200
Who were the Great Pyramids built for?
Pharaohs
200
What does DoS mean?
denial-of-service
200
What kind of cloud is this?
Cumulonimbus
200
the ability to understand the importance of something
appreciation
300
Name one major source of ultrafine particles.
Vehicle exhaust, factories, or power plants.
300
What material was mainly used to build the pyramids?
Stone blocks (mostly limestone)
300
What is another name for illicit and ethical hackers?
black hat and white hat
300
What process causes clouds to form?
Condensation
300
someone who studies objects or people from the past
archaeologist
400
Which people are most vulnerable to ultrafine particle pollution?
Children, the elderly, and people with respiratory illnesses.
400
Why were the pyramids built?
As tombs for pharaohs
400
Why do companies hire ethical hackers?
To find and fix security weaknesses.
400
What causes rain to fall from clouds?
Water droplets combine, become heavy, and fall
400
better than anything else; excellent; incomparable
unsurpassed
500
What can people do to reduce their exposure to ultrafine particles?
Wear a mask, stay indoors on polluted days, or use an air purifier.
500
What is Kaolinite?
a white material that turns into a clay-like substance.
500
What is the main difference between ethical hackers and illicit hackers?
Ethical hackers have permission; illicit hackers do not.
500
Which cloud type is thin, wispy, and found high in the sky?
Cirrus clouds
500
the process of removing something unwanted from air, water, etc.
filtration